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公开(公告)号：US3535612A
公开(公告)日：1970-10-20
申请号：US3535612D
申请日：1968-12-17
Applicant: BELL TELEPHONE LABOR INC
Inventor： JUDD FRANK F , RABER STANLEY
IPC: H02M7/5375 , H02M7/5383 , H02M7/53846 , H02M7/53862 , H02M7/52 , H02M1/18
CPC classification number: H02M7/53862 , H02M7/53846
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